package com.ruoyi.common.utils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Calendar;
import java.util.Date;

import com.ruoyi.common.constant.TimeUnit;
import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 时间工具类
 *
 * @author ruoyi
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    public static String HH_MM_SS = "HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算相差天数
     */
    public static int differentDaysByMillisecond(Date date1, Date date2) {
        return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
    }

    /**
     * 计算时间差
     *
     * @param endDate   最后时间
     * @param startTime 开始时间
     * @return 时间差（天/小时/分钟）
     */
    public static String timeDistance(Date endDate, Date startTime) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - startTime.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 计算两个时间相差的天数
     */
    public static long getDaysBetween(Date date1, Date date2){
        long timeInMillis1 = date1.getTime();
        long timeInMillis2 = date2.getTime();
        long abs = Math.abs(timeInMillis1 - timeInMillis2);
        return abs / (24 * 60 * 60 * 1000);
    }

    /**
     * 增加 LocalDateTime ==> Date
     */
    public static Date toDate(LocalDateTime temporalAccessor) {
        ZonedDateTime zdt = temporalAccessor.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 LocalDate ==> Date
     */
    public static Date toDate(LocalDate temporalAccessor) {
        LocalDateTime localDateTime = LocalDateTime.of(temporalAccessor, LocalTime.of(0, 0, 0));
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 判断是否为当月的最后一天
     */
    public static boolean lastDayOfMonth(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DAY_OF_MONTH);
        //获取本月最后一天的时间
        calendar.add(Calendar.MONTH, 1);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.add(Calendar.DAY_OF_MONTH, -1);

        int lastMonth = calendar.get(Calendar.MONTH);
        int lastDay = calendar.get(Calendar.DAY_OF_MONTH);

        return month == lastMonth && day == lastDay;
    }

    /**
     * 加num秒
     */
    public static Date addSecond(Date date, int num) {
        if (date == null) {
            date = new Date();
        }
        Calendar instance = Calendar.getInstance();
        instance.setTime(date);
        instance.add(Calendar.SECOND, num);
        return instance.getTime();
    }

    /**
     * 加num天
     */
    public static Date addDay(Date date, int num) {
        if (date == null) {
            date = new Date();
        }
        Calendar instance = Calendar.getInstance();
        instance.setTime(date);
        instance.add(Calendar.DATE, num);
        return instance.getTime();
    }

    /**
     * 计算下一周期开始时间
     *
     * @param cycle     周期
     * @param cycleUnit 周期单位
     * @return 计算得出的时间
     */
    public static Date getNextDateByCycle(Date date, Integer cycle, String cycleUnit) throws IllegalAccessException {
        return getDateByNumCycle(date, cycle, cycleUnit, 1);
    }

    /**
     * 计算上一周期开始时间
     *
     * @param cycle     周期
     * @param cycleUnit 周期单位
     * @return 计算得出的时间
     */
    public static Date getLastDateByCycle(Date date, Integer cycle, String cycleUnit) throws IllegalAccessException {
        return getNextDateByCycle(date, -cycle, cycleUnit);
    }

    /**
     * 计算第num周期开始时间
     *
     * @param cycle     周期
     * @param cycleUnit 周期单位
     * @param num       周期数
     * @return 计算得出的时间
     */
    public static Date getDateByNumCycle(Date date, Integer cycle, String cycleUnit, Integer num) throws IllegalAccessException {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int amount = cycle * num;
        TimeUnit timeUnit = TimeUnit.getByCode(cycleUnit);
        switch (timeUnit) {
            case SECOND:
                calendar.add(Calendar.SECOND, amount);
                break;
            case MIN:
                calendar.add(Calendar.MINUTE, amount);
                break;
            case HOUR:
                calendar.add(Calendar.HOUR_OF_DAY, amount);
                break;
            case DAY:
                calendar.add(Calendar.DATE, amount);
                break;
            case WEEK:
                calendar.add(Calendar.WEEK_OF_YEAR, amount);
                break;
            case MOON:
                calendar.add(Calendar.MONTH, amount);
                break;
            case YEAR:
                calendar.add(Calendar.YEAR, amount);
                break;
        }
        return calendar.getTime();
    }

}
